diff --git a/README.md b/README.md
index 7967634..588c902 100644
--- a/README.md
+++ b/README.md
@@ -12,7 +12,7 @@ Allows to dig deeper into your application.
 
 * You should have running Spring Boot application with enabled Spring Boot Actuator ```beans``` endpoint.
 
-* You may need to configure Spring Beans Visualized application by modifying constants in ```app.json``` file. Most likely you have to setup your user/password and application host/port, probably Spring Boot Actuator endpoints base path.
+* You may need to configure Spring Beans Visualized application by modifying constants in the ```app.js``` file. Most likely you have to setup your user/password and application host/port, probably Spring Boot Actuator endpoints base path.
 
 * Get dependencies & start _Spring Beans Visualized_ application
 ```